$1300 (less than 1000 euro) = 16 GB of RAM + 17.3″ native 1920×1080 HD screen + 8 cores (i7) + 3 GB video memory (GL 4.2, DX11) + 750 GB Disk + Windows 7.
Why would you pay twice as much to get one third of the power? Perhaps to get a fruit logo in the back of the screen? To make it lighter so you can have its companion while in bed or in the toilet? Well, this is no toy, kid, but a working machine.
So, lets the coding and mathemagics begin!